New Genuine PAI Gasket P/N 331285(Quantity of 1 Gasket as pictured).  

NOTE:  May come in different color than what is pictured.

Alternative and other replacement reference part numbers:  Caterpillar 4N1156, 4N-1156.

Description:  Regulator Thermostat Cover Gasket.

Application:  Caterpillar 3400 Series, 3406E, C15, C16 & C18 Series.

Please Contact us with the Engine Family and the Engine Serial No. and the Arrangement No. if you have any doubt this is the correct part, or please contact your local OEM dealership for correct part # to ensure correct part. 

Check out my other items!  We can also combine orders to save on shipping.

If you need any parts not found on our eBay store let us know, we may have the part in store and we don't mind making an eBay page for it.

We're an authorized dealer of PAI and Excel products, please let us know if there is any other parts you might need, thanks.